Three of the angles of a polygon are 105.5
sum of the angles in the
polygon is 2520 find each of the other
angles if they are equal to each other

Isuck at math ; ^; m a student solved this problem and said the answer is 3 feet. chase had a roll of ribbon that contained 7 7/8  feet of ribbon. he cut off one piece that was 3 5/8  feet long and another piece that was 1 1/4  feet from the roll. how much ribbon was left on the roll? is the student's answer reasonable? yes, the answer is reasonable. no, the answer is not reasonable. it should be about 2 feet. no, the answer is not reasonable. it should be about 13 feet. no, the answer is not reasonable. it should be about 4 feet.

Combine the information in the problem and the chart using the average balance method to solve the problem.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)